Unit 2- Equilibria

Question 1

Explain dynamic equilibrium

2.8.a

Answer 1

Dynamic equilbirum is when the backward and forward reaction have reached a stage where the net flow of molecules is equal therefore there is no overall effect.

Question 2

How does temperature affect an equilibrium system? 2.8.b

Answer 2

• The system will move to counteract the change
• If the temperature is increased, the system will move to decrease the temperature therefore favour the endothermic side, as it will take in energy thus reducing the temperature
• If the temperature is decreased, the system willmove to increase the temperature therefore favour the exothermic side, as it will release energy thus increasing the temperature

Question 3

How does concentration affect an equilibirum system?

2.8.b

Answer 3

• The system will change to counteract the change in concentration
• If a reactants concentration is increased, the system will favour the products to use up the reactants so an equilibrium can be reached
• If a products concentration is increased, the system will favour the reactants to use up the prodcuts so an equilbrium can be reached
• If a products concentration is decreased, the system will favour the the products side to increase the products so an equilibrium can be reached

Question 4

How does pressure affect an equilibrium system?

2.8.b

Answer 4

• The system will change to counteract the change in pressure
• If the pressure is increased, the system will favour the side with less moles.
• If the pressure is decreased, the system will favour the side with more moles.
• If the number of moles are equal on both sides, there are no changes in the equilibrium system